Netflix says my account is already in use when I try to watch.

Your Netflix account has reached the limit of active streams. Follow the troubleshooting steps below to resolve the issue.

Stop streaming on other devices

If you've shared your Netflix account with friends or family, they may be using Netflix while you're trying to watch a movie or TV show. The number of users that can stream at the same time will depend on your
Netflix plan. You can see the limit for your account, as well as other plan options, from the Change Plan page.

To solve this problem, make sure that no one else is using your account before trying to stream again.